Year	Number
2004-01-01	83.2845
2005-01-01	85.9238
2006-01-01	86.4125
2007-01-01	88.0743
2008-01-01	89.3451
2009-01-01	91.6911
2010-01-01	94.4282
2011-01-01	97.9472
2012-01-01	99.3157
2013-01-01	101.7595
2014-01-01	105.0831
2015-01-01	106.7449
2016-01-01	108.1134
2017-01-01	108.8954